How do I make that if the form is empty, it cannot submit?

[moishy]

Hi! I'm making an order form where the customers fill out the desired quantity, and the form is emailed to me.
But they also must fill out their contact info.

So How do I make it, that if they havn't filled out fields A, B, or C - the page will just refresh, and not Submit.


Thanks in advance folks.

[mainul]

Hey you can try this code.


<?php if(empty($_POST['A'] ||$_POST['B'] ||$_POST['C'])){ // names from the form feild
print 'error go back';
// if you want to go back to the orignal form with messages like that i would use a session or hidden feilds to pass back the orignal data sent and the error message to print
}else{
//sendl script or whatever you need to do
}
?>

[moishy]

Hey you can try this code.

Yeah, I tryed it but the error is:
Parse error: syntax error, unexpected T_BOOLEAN_OR, expecting ')'

Any help?

[bevort]

Use Javascript or VB script
First start with a disabled button.
Then, with the onChange() event remove the disabled status if a user chahges the content of a field.
Do not forget to check with the onSubmit() event if at least one field has some content

A standard rule should be to do on the client side what can be done there instead of doing it on the server

[ronverdonk]

A standard rule should be to do on the client side what can be done there instead of doing it on the server

Where is that rule written?
What about security issues on a client?
What if JavaScript is disabled on the client?

Ronald :cool: